arXiv AI

Failure Is the Mother of Success: Recovering Supervision with Grounding Hindsight

The paper introduces Replay-Selected Hindsight Distillation (RSHD), a method that transforms failed attempts in GRPO training into useful supervision. By having the policy write corrective notes for each failure and re-solving the problem with those notes, RSHD admits only those notes that lead to higher success rates than the original attempts. This approach enables learning from groups where all rollouts fail and improves performance across multiple model families and domains.

arXiv AI
Sep 16

ReDraft, Don't Just Distill: Reference-Driven Revision for Continual VLLM Post-Training

ReDraft is a reference‑driven revision method for continual post‑training of large multimodal language models. It uses the model’s own incorrect outputs as references, revises them, verifies the revisions, and fine‑tunes on the accepted ones, thereby combining explicit supervision with policy proximity. On tasks such as Counting, Clock Reading, and Jigsaw, ReDraft outperforms standard supervised fine‑tuning and on‑policy methods, achieving higher target‑task gains while dramatically reducing forgetting.

By Zhihao Zhang, Mingqi Wu, Qiaole Dong, Enyu Zhou, Shuo Li, Boyang Liu, Jiazheng Zhang, Honglin Guo, Xin Guo, Shaofan Liu, Junzhe Wang, Dingwei Zhu, Zhiheng Xi, Minlong Peng, Yuan Hua, Qi Zhang, Tao Gui, Xuanjing Huang
arXiv AI
Jul 15

A Learning-Rate-Gated Failure of GRPO in a Small Language and Vision-Language Model Web Agent: A Controlled Null and Its Mechanism

arXiv:2607. 12640v1 Announce Type: new Abstract: Reinforcement learning with verifiable rewards, and Group Relative Policy Optimization (GRPO) in particular, is now run routinely on a supervised checkpoint in the hope of producing a stronger agent.

By Chengguang Gan, Zhixi Cai, Yunhao Liang, Hanjun Wei, Shiwen Ni, Qinghao Zhang
arXiv AI
Oct 19

Distill Until Divergence: Error-Truncated Hindsight Distillation for Agentic RL

The paper introduces Distill Until Divergence, a method for agentic reinforcement learning that uses error-truncated hindsight distillation. It routes two complementary hindsight skills—Positive for successful workflows and Negative for failure corrections—based on trajectory outcomes and error boundaries. The post-error segment is optimized solely by GRPO, preserving outcome-based learning while avoiding mismatched hindsight supervision.

By Yibin Huang, Conghui Zhu
arXiv AI
Jun 2

Multi-Rollout On-Policy Distillation via Peer Successes and Failures

arXiv:2605. 12652v2 Announce Type: replace-cross Abstract: Large language models are often post-trained with sparse verifier rewards, which indicate whether a sampled trajectory succeeds but provide limited guidance about where reasoning succeeds or fails.

By Weichen Yu, Xiaomin Li, Yizhou Zhao, Xiaoze Liu, Ruowang Zhang, Haixin Wang, Yinyi Luo, Chen Henry Wu, Gaurav Mittal, Matt Fredrikson, Yu Hu